Rotary selector valve



July 26, 1949 w. WEITZEN 2,477,025

ROTARY SELECTOR VALVE 'Filed Sept. 27, 1.946 4 Sheets-Sheet 1 July 26, 1949. w. WEITZEN 2,477,025

ROTARY SELECTOR VALVE Filed Sept. 27, 1946 4 Sheets-Sheet 3 INVENTOR. way/7M WE/ TZEN July 26, 1949. w. WEITZEN 2,477,025

ROTARY SELECTOR VALVE Filed Sept. 27, 1946 4 Sheets-Sheet 4 I02 72 mo 74 56 70 44-" 36 78 f mmvrox.

. W/LL/HMI WE/TZEN 50. BYW 19m:

and the rotor secured thereto.

Patented July 26 1949 UNITED STATES PATENT OFFICE 7 2,477,025 ROTARY SELECTOR VALVE William Weitzen, Dayton, Ohio Application September 27, 1946, Serial No. 699,652

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) 4 Claims.

The invention described herein many be manufactured and used by or for the Government for governmental purposes without the payment to me of any royalty thereon.

This invention relates to selector valves and particularly to selector valves of the rotary type.

An object of the invention is to provide a device whereby any one of a plurality of sources may be selectively connected to a single gauge to show the pressure or suction of the selected source with respect to atmosphere or with respect to any other selected reference pressure.

Another object is to provide a device whereby any two of a plurality of sources may be selectively connected to the same gauge to show the difference in pressure between the two sources.

Another object is to provide means whereby a relatively large number of pressure sources may be connected to the device at the same time, through certain sources selected and tested for pressure or pressure difference as desired.

Further objects and advantages will become evident as the invention is further described with reference to the drawings wherein,

Fig. 1 is a front view of an embodiment of the invention showing the dial, pointer and setting knobs.

Fig. 2 is a rear View showing the outlets for connection to the various pressure sources and to the gauge.

Fig. 3 is an axial half section taken at 3-3 of Figs. 1 and 2, as when the pointers are both at P.

Fig. 4 is an axial half section taken at 4-4 of Figs. 1 and 2, as when the pointers are both at S.

Fig. 5 is an axial section taken at 5-5 of Figs. 1 and 2 as when the pointer of the larger setting knob is at H.

Fig. 6 is an axial section at 66 of Figs. 1 and 2,.

as when the pointer of the larger setting knob is at l2.

Fig. '7 is an axial section taken at 1-1 of Figs. 1 and 2 as when the pointer of the smaller setting knob is at N.

Fig. 8 is an axial section taken at 88 ofFigs. 1 and 2 as when the pointer of the small setting knob is at l2. 7

Like reference characters refer to like throughout the several views.

The body or stator 40 is chambered to house the large rotor 42 and smaller rotor 44. The smaller rotor 44 has a shaft 46 which may be integral part of the rotor or be made separately The rearward parts portion of shaft 46 is journalled in a, bearing hub 48 of the stator ,or body. A cover 50 encloses the two rotors and is fastened to the body by screws 52. A gasket 54 between the body 40 and cover 50 provides a pressure tight joint.

The large rotor 42 has a hollow shaft 56 which, on the outside, has rotative bearing in the cover 50 and on the inside provides rotative bearing for the forward portion of the shaft 46. Seals 58 prevent leakage between the cover 50 and hollow shaft 56 and seals 60 prevent leakage between the hollow shaft 56 and the shaft 46.

The rearward faces of the rotors 42 and 44 are provided with bearing surfaces on the forward sides of plates 63 and 64, respectively. Plates 62 and 64 have annular portions 66 and 68 which are press fitted into corresponding grooves in the body 40, the forward surfaces of the plates being then preferably ground and lapped in situ.

That portion of the hollow shaft 56 which projects forwardly through the cover 50 is provided with a large setting knob 10 having a pointer 12. The knob 10 and pointer I2 are integral in the exemplification shown but may, of course, be separately made and assembled by any conventional means if ,so desired. A screw 14 secures the knob 10' to the hollow shaft 56.

That portion of the shaft 46 which projects forwardly through the hollow shaft 56 is provided with a relatively smaller setting knob 16 which carries a pointer I8, the knob being secured to the shaft by a screw 80. A relatively strong compression spring 82 reacts against a washer 84 and castle nut 86 to maintain suitable contactof the small rotor 44 with the plate 64. A

lighter compression spring 88 reacts against a washer 90 to maintain suitable contact of the large rotor 42 with the plate 62.

The rearward face of the body 40 is provided with two concentric circular rows of tapped outlets consecutively numbered l, 2, 3, etc, the odd numbers being assigned to the outer row and the even numbers to the inner row. Two outlets marked P and S are reserved for connection to the P and S terminals of a zero center pressure gauge 92. One or more additional outlets as for instance 2| and/or 22 may be reserved for connection to the atmosphere or to any fixed reference pressure with which pressure sources are to be compared and pressure differences measured.

A single opening 94 extends through the large rotor 42, the opening 94 being preferably in alignment with the pointer 12. Another single opensmall rotor 44. r A passageway I06 connects the odd numberedoutlet II to the forward faces of both plates '62 and 64 (see Figs. and 7), and if the large knob pointer 12 is then at II, so as to place the opening 94 in communication with the passageway I06 as in Fig. 5, the odd numbered outlet II will be connected to the gauge outlet P as inFig'.

' tending from the odd andeven numbered outlets all extend to, and through the plates 62 and 64.

It will be outlets were in a single circular row, passageways I06 and I I0 could be made exactly alike. 1 It will now beapparent that placing the large knob pointer opposite any numbered outlet con-- nects that outlet to the P gauge outlet,'while plac- .ingthe small knob pointer opposite any numbered V L outlet connects that outlet to the S gaugeoutlet. The o eration of the device is substantially as follows:

5, while if the small knob pointer 161s then at II, so as to place the opening56 in communie cation with the passageway I06 as in Fig. 7, the odd numbered outlet II will be connected to the gauge outlet S. The assageway I06 shown exe tending from the outlet II is exactly typical'of the passageways extending from all odd numbered outlets.

A passageway III] connects the even numbered ou'tlet l2 to the forward faces of both plates 62 and 64 (see Figs. 6 andli) and if the large knob pointer I2 is then at I2,-so as to place the openhis 94 in communication with the passageway 'I I0 as seen in Fig. 6, the even numbered outlet 7 let II. If the source connected to "II had been I2 will be connected to the gauge outlet P as in r Fig. "6, while ifth'e small knob pointer 18 is then at I2, so as to place theopenin'g '96 in communication with the passageways Ill! as in Fig. 8, this even numbered outlet I2 will be connected 'to'the gauge outlet S as in Fig; 8. The passageway 110 shown extending from the outlet .12 is exactly typical of the passageways extending from all even numbered outlets. V

From Figs. 3 and 4 it will be apparent that when either the large or the small k nob pointers 12'or 18 point to the P or the-S positions, there will be no connection between any of the numbered outlets and the P or Soutl'e'ts f'or the-reason that, at these positions, there is no openingthrough the plates 62 or '64 and the single openings 94 -and 96 are at thesepoints on the plates 62 or '64 which do not have openings. Figs. 5 through'il, however. show that the passageways I06 and H0 extendin from the odd and even numbered outlets all extend toand through the plates 62 and 64 (see Figs. Gand 8), and if the large knob pointer 12 is then at I 2, so as to place the opening 94 in communication with the passageway III] as seenin-Fig. '6,

the even numbered outlet I2 will be connected to the gauge outlet P as inFig. 6, while if the small -knob pointer 18 is then at I2, so as to place the opening 96 in communication with the passageways III) as in Fig. -8, the even numbered outlet I2 will be connected to the gauge outlet S asin The passageway IIO shown extending Fig. 8. from the outlet I2 is exactly typical of the passageways extending from all even numbered out- 7 "From Figs. .3 and 4 it will be apparent that when 7 either the large or the small knob pointers I2 or 18 point to the P or the positions.th'ere will be no connection between any of the numbered-outlets and the 'P or S outlets for the reason that,-

do not have openings. Figs. "5 through'B, however, snow that the passageways its and Hi) exijatmo'sph'erewould thenhav'e. been-' registered on .7

Assume that outlet 2| has been left open to atino'sphere andthat a source of suction, i. e., negativepressure, is connected to the outlet II and that it is desired'only to measure the suction of the source with respect to atmospheric pressure,

neeted toPinFig. 5. The suction side S of the gauge 92 will now be connected to I I and the pressure side 'Pwill be connected to atmosphe'rathe gauge '92 .thereby reading the subatmospheric pressure of the source which is connected to outpositive, I'I should-have -been connected to]? as it is connected to P. in Fig. 5, and 2I should have been connected to 'S as I 'I is connected to S-in Fig.

7. The positive pressure at IIZwith respectto the? side of the gauge-92. The vforegoing is idescriptive of the manner in which a positive or negative pressure may .be measured with respect to the pressure of the ambient air. Where the at mospheric-pres'su-r'evaries-aster instance on an :aircrafaran outlet as "at 22 may be connected' to any fixed pressure source and :usedi'a's a reference pressure outlet instead :or II.

Assume again that the 'differen ce between a "-greate'r ositive pressure source whicn is con- 'nected to I2,' and-:a 1'ess'er positive pressuresource :which is connected to II is to'b'e determined-at a single setting of the Knobs; By turnin the large knob pointer to I2 as in Fig. 6; and-the small le-nob pointer to 41 as in Figiq, "the greater pres- -sure will be --ecnnected to-theP sldeof the gauge 92 and the lesser pressure to the S side,whereby the difference between the two pressures willbe visually recorded at one setting. It will be. evi- 1 dent that any pressure source which is connected 9 to oneof the outlets'may be used as a reference. 1

pressure against which all othe r pressure sources may be evaluated. 7 V

The device is highly advantageous in. that it is extremely smalland light considering the great number of outlets involved and that it requires only a single gauge, and may therefore be used in restricted spaces as in flight test work where numerous pressure indicators cannot be installed due to a lack of space.

Having described an embodiment of my invention, I claim: I 1. A rotary selector valve which comprises a housing in "the form of a cylinderfwith both ends closed, two concentric circulair rows of pressure receiving enings in the rearward end 'wa'll of thecylinder, one'r'o'w within theothe'r, two cancentric axially spaced disc type rotors "independenu rotatabie'witlfin said housing. one rotor being smaller than the other "and positioned nearer tne rearward end or "saidhousing, two concentric shafts, one extcfldingir'o'm each rotor forwardly.

obvious that if all of the numbered through the front wall of said housing, two valve setting knobs with pointers, one on each shaft outside and adjacent the front of said housing, a circular row of indicia on the front of said housing corresponding in number and position to the pressure receiving openings in the rear wall of said housing, two seats in said housing, one for each rotor, positioned to be engaged by the rearward faces of said rotors, a spring for each motor urging it upon its seat, a large and a small pressure tight chamber formed around the forward faces of the large and small rotor respectively, a single axially parallel port through each rotor circumferentially positioned to correspond to said pointers, and passageways, one connecting one of the outer row of pressure receiving openings to the larger chamber, one connecting One of the inner row of pressure receiving openings to the smaller chamber, and one connecting each of the remaining pressure receiving openings to the forward faces of both the large and the small rotor seats.

2. A rotary selector valve which comprises a housing in the form of a cylinder with both ends closed, a series of circularly arranged pressure receiving openings in the rearward end wall of the cylinder, two concentric axially spaced disc type rotors independently rotatable within said housing, one rotor being positioned nearer the rearward end of said housing than the other, two concentric shafts, one extending from each rotor forwardly through the front wall of said housing, two valve setting knobs with pointers, one on each shaft outside and adjacent the front of said housing, a circular row of indicia on the front of said housing corresponding to the pressure re-' ceiving openings in the rear wall of said housing, two seats in said housing, one for each rotor, positioned to be engaged by the rearward faces of said rotors, a spring for each rotor urging it upon its seat, a separate pressure tight chamber formed around the forward face of each rotor, a single axially parallel port through each rotor circumferentially positioned to correspond to said pointers, and passageways, one connecting one of the pressure receiving openings to one chamber, one connecting another of the pressure receiving openings to the other chamber, and one connecting each of the remaining pressure receiving openings to the forward faces of both rotor seats.

3. A rotary selector valve which comprises a housing in the form of a cylinder with both ends closed, a series of pressure receiving openings in the rearward end wall of the cylinder, two concentric axially spaced disc type rotors independently rotatable within said housing, one rotor being positioned nearer the rearward end of said housing than the other, two concentric shafts, one extending from each rotor forwardly through the front wall of said housing, two valve setting means with pointers, one on each shaft outside and adjacent the front of said housing, a circular row of indicia 0n the front of said housing corresponding in number to the pressure receiving openings in the rear wall of said housing, two seats in said housing, one for each rotor, positioned to be engaged by the rearward faces of said rotors, a separate pressure tight chamber formed around each of the forward faces of the rotors, a single axially parallel port through each rotor positioned to correspond to said pointers, and passageways, one connecting one of the pressure receiving openings to one chamber, one connecting another of the pressure receiving openings to the other chamber, and one connecting each of the remaining pressure receiving openings to the forward faces of both rotor seats.

4. A selector valve which comprises a closed housing, pressure receiving openings in the wall of the housing, two rotors independently rotatable within said housing, two shafts, one extending from each rotor through the wall of said housing, two valve setting means with pointers, one on each shaft outside of said housing, indicia. on said housing corresponding in number to the pressure receiving openings in the wall of said housing, two seats in said housing, one for each rotor, positioned to be engaged by one of the faces of said rotors, a separate pressure tight chamber formed around the other of the faces of the rotors, a single opening through each rotor positioned to correspond to said pointers, and passageways, one connecting one of the pressure receiving openings to one chamber, one connecting another of the pressure receiving openings to the other chamber, and one connecting each of the remaining pressure receiving openings to the faces of both rotor seats.

WILLIAM WEITZEN.

REFERENCES CITED The following referenlces are of record in the file of this patent: 

